The pie charts compare the distribution of parkway customer service between 2005 and 2010.
Overall, it is evident that satisfactory and good accounted for the dominant components in both years, although its proportions are increased and decreased over time. Meanwhile, excellent service experienced the most noticeable change, whereas the remaining segments underwent relatively moderate fluctuations.
In 2005, satisfactory accounted for 45%, making it by far the most significant segment. This was followed by poor, which comprised 21%, while very poor and good represented a more modest shares at 15% and 14% respectively. Collectively, these four categories constituted 95% of the total. By contrast, excellent contributed for only 5%, indicating that it made a negligible contribution to the distribution in that year.
Turning to 2010, satisfactory recorded at 17%, despite a significant decrease compared with the earlier figure. Notably, good service experienced the most pronounced shift rising from 14% to 39%. Meanwhile, poor and very poor services declined to 17% and 4% respectively, while excellent rose slightly to 28%.